Marcel Duchamp.Rotary Glass Plates (Precision Optics).
1920. Five painted glass plates that rotate around a metal axis and appear to be a single circle when viewed at a distance of one meter. 120.6 x 184.1 cm and glass plate of 99 x 14 cm. Yale Center for British Art, New Haven, CT, USA. [Order a Print][Order a Hand-Painted Reproduction]